Tank-valve.



F. W ROBERTSHAW.

TANK VALVE. APPLICATION FILED T21R28, 1914. l,l25,596fl Patented Jan.19,1915.

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a r 7 r/ I FREDERICK w. ROBERTSHAW, or PITTSBURGH, PENNSYLVANIA TANK-VALVE.

Application filed February 28, 1914. Serial No. 821,822.

To all whom it may concern:

Be it known that I, FREDERICK \V. ROB-- En'rsIIAw, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Tank-Valves, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming, part of this specification, in which Figure 1. is a side elevation of a valve embodying my invention; Fig. 2 is a view of the same partly in side elevation and partly in vertical section; Fig. 3 is a section on the irregular line IIIIII of Fig. 1; and Fig.

4 is a section on the line IV-IV of Fig. 2. v

My invention has relation to tank valves, and more particularly to valves of the general character described and claimed in Patent No. 864,262, granted to F. S. McTighe and myself on August 27, 1907.

The object of the present invention is to so construct a valve device of the general character of that in the said patent, as to permit of ready inspection of the movable valve member at all times, without the necessity for dismantling; also to improve the construction and arrangement of the upper portion of the valve member and its packing; and also to improve the construction of the valve device in other respects as will hereinafter more fully appear.

The nature of the present invention will be best understood by reference to the accompanying drawings, in which I have shown the preferred embodiment thereof and which will now be described, it being premised, however, that various changes mav be made in the details of construction and arrangement of the parts, without departing from the spirit and scope of my invention as defined in the appended claims. In these drawings, the numeral 2 designates the usual tail piece, to which the water supply pipe (not shown) is connected and which is provided with the usual jam nut 3, for securing the valve in place in the bottom of a .float tank as in the said patent.

Secured to or formed integrally with this tail piece is a valve casing which comprises a. lower portion 4, and an upper portion 5. These two portions are separated from each other vertically by the free space 6 and are connected only by the laterally ofi'set yoke Specification of Letters Patent.

Patented Jan. 119, 19115.

arms 7. The vertically movable valve member has a lower cylindrical portion 8, whichhas a neat bearing fit in the opening 9 in the top wall of the lower casing portion 4. The

lower end of this portion 8 is adapted to close on the valve seat 10, which surrounds the port or passage 11, which leads from the tail pipe into the interior discharge chamber 12 of said casing portion. The seating face of the valve member is preferably provided with a washer 13, secured by a screw 14.

Within the open space 6 between the upper and lower casing portions 4 and 5, the valve member has a reduced portion 15, between the portion 8 and the collar 16. This reduced portion is engaged by the bi-' furcated endportion 17 of the usual float lever 18, which is pivoted to one of the connecting arms 7 at 19; The upper portion of the valve member extends within the upper casing portion 5, and has secured-t0 its upper end by a screw 20 or other suitable means a flexible cup leather 21. This upper is substantially balancedthebalancing pressure in the cylinder of the cap 22 being obtained bya vertical passage 23, through the valve body, as in the patent above referred to.

In order to permit the valve and its cupleather to be readily introduced into the cylinder, the lower end of the cylinder and the interior of the upper casing portion 5 are cut out to form a bell-mouth.

The numeral 24 designates escape openings in the casing portion 4, through which the water from the tail pipe flows into the tank when the valve member is unseated. 25 designates the usual connection on the casing portion 4 for the after How.

By separating the upper portion and lower casing portions 4 and 5 in the manner herein shown and described, the operation of the valve member can be readily inspected at any time without dismantling the valve or removing any of the parts. This constistruction also provides means whereby it can be readily determined if the valve mem-- her is leaking at either end portion.

The construction at the upper end of the valve member in which the cup leather 21 is directly secured thereto, is also an important improvement over the construction shown in said patent. That construction required the use of a rigid ring secured between the cap member and the upperportion of the casing and also a leather or flexible washer over said ring and through which the neck of the valve member extended. Trouble was experienced in the operation of these valves, due to the difficulty of maintaining these leather washers in proper condition. The present construction enables the use of a cup leather of the usual character and 'which will maintain itself in proper condition for a considerable length of time.

It will be noted that the present construction omits the feature of the inner series of discharge openings in the lower portion of the casing, which were present in the casing portion and controlling said port, and

its opposite end portion extending into said cylinder and carrying a cup-leather, said upper casing portion'haying an enlarged opening around the valvebelow the open end of the cylinder; substantially as described.

i 2. A valve device of the character described, comprising a lower casing portion having an annular valve guide and a port below the guide, oppositely arranged yoke upper internally threaded portion carried by said arms, and a cylinder threaded into said upper portion and open at its lower end, the lower end of the cylinder and said upper portion being bell-mouthed; substantially as described.

In testimony whereof, I have hereunto set my hand.

FREDERICK W. ROBERTSHAWV. 'Witnesses:

. 'GEO. B. BLE 'ING,

GEO. H. .PARMELEE.

, arms rising from said annular portion, an 

